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C++ Introduction
course content

Course Content

C++ Introduction

C++ Introduction

1. Getting Started
Why to Learn C++What is C++Entry Point of a ProgramStandard Library and FilesPreprocessor DirectivesThe First Program
2. Variables and Data Types
Introduction to VariablesData TypesNumerical Data TypesIntroduction to StringIntroduction to ArraysKeywords sizeof(), auto and typedefWorking with the Array
3. Introduction to Operators
Simple OperatorsA Little MathLogical OperatorsCompound Assignment OperatorPracticing Math Basics
4. Introduction to Program Flow
If...else StatementTernary OperatorSwitch StatementWhile LoopDo...while LoopFor LoopFibonacci Number with Loops
5. Introduction to Functions
What are Functions?Type of FunctionsReturn Statement in FunctionsFunctions With Arguments Simple Function

bookFunctions With Arguments

A function with a parameter (argument) is a function that has to work with an object from the outside the function.

Note

A function argument is a local variable created and exists only in the current function.

For example, let's create a function that divides any integer by 2:

To use such a function, you need to call it and pass an argument to it:

Here is an example:

cpp

main

copy

              
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#include <iostream>

int func(int argument)
{
	int result = argument / 2;
	return result;
}

int main()
{
	//function calling and passing it an argument
	std::cout << "func() returned: " << func(10);
}

You can pass multiple arguments to a function:

cpp

main

copy

              
1234567891011

            
#include <iostream>

int func(int a, int b)
{
	return a + b; //the function to sum arguments
}

int main()
{
	std::cout << "sums the arguments = " << func(5, 7);
}

func(5, 7) – calling a function and passing arguments to it. Arguments are passed with commas (,). You can also pass arrays:

cpp

main

copy

              
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#include <iostream>

//the size of the passed array is optional 
int func(int arrayForFunc[])
{
	return arrayForFunc[2]; //function will returned third element
}

int main()
{
	int array[6] = { 75, 234, 89, 12, -67, 2543 };
	
	//calling function
	std::cout << "Third element of array is: " << func(array);
}

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Section 5. Chapter 4
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